From patchwork Wed Mar 24 10:40:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chun-Jie Chen X-Patchwork-Id: 12160721 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79433C433E0 for ; Wed, 24 Mar 2021 10:52:09 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2477B61A07 for ; Wed, 24 Mar 2021 10:52:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2477B61A07 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wB3JA0FL4y4kH+AI1w0Jv6XrngpVjM5oXGlQL0zMLbU=; b=qmKPDI2+MQCmnMXTVS99d75gI jMlLIVWeEE5SOw0r1pKqAoBigTrs4aba8n024JHI551A5wzKz3DK347JzUuxkh6lzoS/tBEXSjdO/ QSmrQADO3obRIUpuieZUrz5gVZGI0kMcu56qfiaIQyy63EtrkgzXZ7wCFJEPoT1uO68juKgBNnfPP sSQOrl8eUCYCQ6mEG0JtJCzZ1J+z/ExAF9L0sf2oy7qXqWCzHEx//qOshHjr9e38VZA2fF8xtsjvK v0ITRoxcnDfGPnRWawRom0e2r4rgTQUHeY4Xg6c6mgdBGCeFZJO8+VWnoATUYLJmlym2bAZ26jX/l npiLUQgkw==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lP17A-00Gues-NS; Wed, 24 Mar 2021 10:51:53 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lP15d-00Gu1G-7I; Wed, 24 Mar 2021 10:50:20 +0000 X-UUID: 1704990b78fe41548e2f1fb6a0b1ef17-20210324 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=IVKyf+8EVpzOVb40c0TWhp9PMyJJvmJ/qr1SkhSX2e8=; b=DfMf/sKHaAqbPzQNXbPq4WLHkhuDF09umRw7ayL4KtOeKPEmAT+c+kHgrHgH+OApjNwKvroQwDfjFi1drybIjVtr06vI2O2f1MK2ICOfhURXIlQypybIkpYx/HDY4kLikExMiBv5Gkp5/xronc/rowEmyZJEBwyNaLFRFUrIadY=; X-UUID: 1704990b78fe41548e2f1fb6a0b1ef17-20210324 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1888721872; Wed, 24 Mar 2021 02:49:52 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 03:41:27 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 18:41:25 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 24 Mar 2021 18:41:25 +0800 From: chun-jie.chen To: Matthias Brugger , Rob Herring , Stephen Boyd , Nicolas Boichat CC: , , , , , , chun-jie.chen , Weiyi Lu Subject: [RESEND PATCH v7 07/22] clk: mediatek: Fix asymmetrical PLL enable and disable control Date: Wed, 24 Mar 2021 18:40:55 +0800 Message-ID: <20210324104110.13383-8-chun-jie.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210324104110.13383-1-chun-jie.chen@mediatek.com> References: <20210324104110.13383-1-chun-jie.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210324_105019_289781_2E1C7902 X-CRM114-Status: GOOD ( 15.16 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org In fact, the en_mask is a combination of divider enable mask and pll enable bit(bit0). Before this patch, we enabled both divider mask and bit0 in prepare(), but only cleared the bit0 in unprepare(). In the future, we hope en_mask will only be used as divider enable mask. The enable register(CON0) will be set in 2 steps: first is divider mask, and then bit0 during prepare(), and vice versa. But considering backward compatibility, at this stage we allow en_mask to be a combination or a pure divider enable mask. And then we will make en_mask a pure divider enable mask in another following patch series. Reviewed-by: Ikjoon Jang Signed-off-by: Weiyi Lu Signed-off-by: chun-jie.chen --- drivers/clk/mediatek/clk-pll.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index f440f2cd0b69..11ed5d1d1c36 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -238,6 +238,7 @@ static int mtk_pll_prepare(struct clk_hw *hw) { struct mtk_clk_pll *pll = to_mtk_clk_pll(hw); u32 r; + u32 div_en_mask; r = readl(pll->pwr_addr) | CON0_PWR_ON; writel(r, pll->pwr_addr); @@ -247,10 +248,15 @@ static int mtk_pll_prepare(struct clk_hw *hw) writel(r, pll->pwr_addr); udelay(1); - r = readl(pll->base_addr + REG_CON0); - r |= pll->data->en_mask; + r = readl(pll->base_addr + REG_CON0) | CON0_BASE_EN; writel(r, pll->base_addr + REG_CON0); + div_en_mask = pll->data->en_mask & ~CON0_BASE_EN; + if (div_en_mask) { + r = readl(pll->base_addr + REG_CON0) | div_en_mask; + writel(r, pll->base_addr + REG_CON0); + } + __mtk_pll_tuner_enable(pll); udelay(20); @@ -268,6 +274,7 @@ static void mtk_pll_unprepare(struct clk_hw *hw) { struct mtk_clk_pll *pll = to_mtk_clk_pll(hw); u32 r; + u32 div_en_mask; if (pll->data->flags & HAVE_RST_BAR) { r = readl(pll->base_addr + REG_CON0); @@ -277,8 +284,13 @@ static void mtk_pll_unprepare(struct clk_hw *hw) __mtk_pll_tuner_disable(pll); - r = readl(pll->base_addr + REG_CON0); - r &= ~CON0_BASE_EN; + div_en_mask = pll->data->en_mask & ~CON0_BASE_EN; + if (div_en_mask) { + r = readl(pll->base_addr + REG_CON0) & ~div_en_mask; + writel(r, pll->base_addr + REG_CON0); + } + + r = readl(pll->base_addr + REG_CON0) & ~CON0_BASE_EN; writel(r, pll->base_addr + REG_CON0); r = readl(pll->pwr_addr) | CON0_ISO_EN;